std_detect/detect/os/linux/
mod.rs

1//! Run-time feature detection on Linux
2
3use alloc::vec::Vec;
4
5mod auxvec;
6
7fn read_file(orig_path: &str) -> Result<Vec<u8>, alloc::string::String> {
8    use alloc::format;
9
10    let mut path = Vec::from(orig_path.as_bytes());
11    path.push(0);
12
13    unsafe {
14        let file = libc::open(path.as_ptr() as *const libc::c_char, libc::O_RDONLY);
15        if file == -1 {
16            return Err(format!("Cannot open file at {orig_path}"));
17        }
18
19        let mut data = Vec::new();
20        loop {
21            data.reserve(4096);
22            let spare = data.spare_capacity_mut();
23            match libc::read(file, spare.as_mut_ptr() as *mut _, spare.len()) {
24                -1 => {
25                    libc::close(file);
26                    return Err(format!("Error while reading from file at {orig_path}"));
27                }
28                0 => break,
29                n => data.set_len(data.len() + n as usize),
30            }
31        }
32
33        libc::close(file);
34        Ok(data)
35    }
36}
37
38cfg_select! {
39    target_arch = "aarch64" => {
40        mod aarch64;
41        pub(crate) use self::aarch64::detect_features;
42    }
43    target_arch = "arm" => {
44        mod arm;
45        pub(crate) use self::arm::detect_features;
46    }
47    any(target_arch = "riscv32", target_arch = "riscv64") => {
48        mod riscv;
49        pub(crate) use self::riscv::detect_features;
50    }
51    any(target_arch = "mips", target_arch = "mips64") => {
52        mod mips;
53        pub(crate) use self::mips::detect_features;
54    }
55    any(target_arch = "powerpc", target_arch = "powerpc64") => {
56        mod powerpc;
57        pub(crate) use self::powerpc::detect_features;
58    }
59    any(target_arch = "loongarch32", target_arch = "loongarch64") => {
60        mod loongarch;
61        pub(crate) use self::loongarch::detect_features;
62    }
63    target_arch = "s390x" => {
64        mod s390x;
65        pub(crate) use self::s390x::detect_features;
66    }
67    _ => {
68        use crate::detect::cache;
69        /// Performs run-time feature detection.
70        pub(crate) fn detect_features() -> cache::Initializer {
71            cache::Initializer::default()
72        }
73    }
74}
std_detect/detect/os/linux/mod.rs

std_detect/detect/os/linux/
mod.rs
